Zoom's conference calling system is the best I've used in terms of connection quality and reliability.
However, the company has a shady history with respect to installing spyware on their user's computers.
"This is a company with a history of playing fast and loose with privacy and security. You may recall last summer, when it came to light that the Mac version of Zoom secretly installed a web server, which remained installed and running even if you deleted the Zoom app from your machine. Shockingly, this enabled a security exploit that allowed hackers to take control of your Mac’s camera — the sort of privacy nightmare scenario that leads folks to tape over their cameras. Zoom called this hidden unremovable-through-normal-means web server a feature, not a bug. The bug was so insidious that Apple had to push a silent MacOS update to remove Zoom’s hidden web servers."
https://daringfireball.net/2020/03/regarding_zoom
However, the company has a shady history with respect to installing spyware on their user's computers.
"This is a company with a history of playing fast and loose with privacy and security. You may recall last summer, when it came to light that the Mac version of Zoom secretly installed a web server, which remained installed and running even if you deleted the Zoom app from your machine. Shockingly, this enabled a security exploit that allowed hackers to take control of your Mac’s camera — the sort of privacy nightmare scenario that leads folks to tape over their cameras. Zoom called this hidden unremovable-through-normal-means web server a feature, not a bug. The bug was so insidious that Apple had to push a silent MacOS update to remove Zoom’s hidden web servers."
https://daringfireball.net/2020/03/regarding_zoom